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How is Food Insecurity related to Obesity?. Lucia Kaiser, PhD, RD Community Nutrition Specialist Dept. of Nutrition, UC Davis Sept 23, 2012. Today’s topics. How and why is food insecurity monitored in the US?

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how is food insecurity related to obesity

How is Food Insecurity related to Obesity?

Lucia Kaiser, PhD, RD

Community Nutrition Specialist

Dept. of Nutrition, UC Davis

Sept 23, 2012

today s topics
Today’s topics
  • How and why is food insecurity monitored in the US?
  • What are the relationships between food insecurity, diet quality, and health risks?
definition of terms ain 1990
Definition of Terms (AIN, 1990)
  • Food security:Food security for a household means access by all members at all times to enough food for an active, healthy life. Includes at a minimum:
    • The ready availability of nutritionally adequate and safe foods.
    • Assured ability to acquire acceptable foods in socially acceptable ways (that is, without resorting to emergency food supplies, scavenging, stealing, or other coping strategies).
history
History
  • 1984--President’s Task Force report: “evidence of hunger in U.S. but unable to estimate extent of the problem”
  • 1987--UC Berkeley conference: lack of problem definition a major impediment
  • 1990—Am Institute of Nutr. publishes definitions of food security/food insecurity/hunger
  • 1991-1992--Several groups publish research on food security instruments (Radimer et. al.; Wehler et. al.; Briefel)
  • 1995--18-item Food Security Supplement administered in US
  • 2006—National Research Council recommends that new methods for measuring hunger be developed
food insecurity as a managed process
Food Insecurity as a “Managed Process”

(Radimer et. al, J. Nutr. 120: 1544, 1990)

Food Secure

Food Secure

Household Food Insecure

Adult Hunger

(Moderate)

Low Food Security=

Child Hunger

(Severe)

Very Low Food Security=

sample items
Sample items:
  • Marginal level: We were worried whether our food would run out before we got money to buy more: often true, sometimes true, or never true
  • Low food security Did you ever eat less than you felt you should because there wasn’t enough money for food?: yes, no
  • Very low food security: Did any of your children not eat for a whole day because there wasn’t enough money for food?: yes, no
slide14
Important caveat: Only poverty-linked food insecurity and hunger are meant to be captured by food security instruments
current definitions 18 item food security supplement
Current Definitions:18-item Food Security Supplement
  • High food security= 0 positive responses: Means no problems
  • Marginal food security=1-2 positive responses: Means anxiety but diet quality, quantity or variety not substantially affected
  • Low food security=3-7 positive: Means low quality & variety of diet but little evidence of reduced intake
  • Very low food security 8-18 positive responses: Means multiple indications of disrupted food patterns and reduced intake
food insecurity in the us current population survey 2011
Food insecurity in the US :Current Population Survey, 2011

14.9% Food Insecure (Low and Very Low Food Security

http://www.ers.usda.gov

why monitor food insecurity
Why monitor food insecurity?
  • Poverty and income measures do not account for local differences in housing and food costs
  • Recent changes in the household (divorce, illness, etc) that affect food insecurity but are not reflected in yearly income
food insecurity increased during the recession 2007 08
Food insecurity increased during the recession 2007-08

Economic Research Service, Available at: http://www.ers.usda.gov

a global nutrition index among 192 countries
Top 5 countries with both high nutrient deficiencies & obesity:

#1 Mauritania

#2 South Africa

#3 Samoa

#4 Lesotho

#5 Fiji

A Global Nutrition Index among 192 countries:

Rosenbloom JI et al Food and Nutrition Bulletin 2008; 29 (4): 266-277

food security of snap recipients improved following the 2009 stimulus package
Food Security of SNAP Recipients Improved Following the 2009 Stimulus Package
  • Stimulus package of 2009 increased SNAP benefits & expanded eligibility
  • SNAP participation & food spending increased
  • Food insecurity dropped 2.2% in low-income hh

http://www.ers.usda.gov/AmberWaves/June11/Features/FoodSecuritySNAP.htm

how is food insecurity related to nutrition health outcomes
How is food insecurity related to nutrition/health outcomes?

Food Insecurity

HH Food Supplies

Health and Weight Status

Dietary Intake

Dietary Intake

food insecurity lowers quality of the diet in immigrant populations
Food insecurity in CA

Lower household supplies of fruit and vegetables—associated with lower intakes of these foods in children

Higher intake of fat, saturated fat, sweets, fried snacks among immigrant children

Food insecurity lowers quality of the diet in immigrant populations

Kaiser et al JNEB 2003

Rosas et al. JADA 2009; 109:2001

how is food insecurity related to nutrition health outcomes1
How is food insecurity related to nutrition/health outcomes?

Food Insecurity

HH Food Supplies

Other Poverty-Related Factors (Unsafe neighborhoods, working conditions, education etc)

Health and Weight Status

Dietary Intake

Dietary Intake

other pathways connecting food security and health outcomes
Other pathways connecting food security and health outcomes

Food Insecurity

Parenting

Depression

Infant feeding

(BF, solids)

Weight for length

Bronte-Tinkew et al, J Nutr 2007: 137: 2160-2165

Early Childhood Longitudinal Birth Cohort, n=8693

food insecurity in the u s is associated with
Food insecurity in the U.S. is associated with:
  • Lower nutrient intakes/dietary quality—especially in adult women
  • Psychosocial problems in children and youth
  • Disordered eating patterns in women
  • Self-reported “poor or fair” health
  • Poor mental health/ depressive symptoms
  • Obesity in adults, mainly women
  • Overweight and obesity in children ????
food insecurity increases risk of chronic disease
Food insecurity: increases risk of chronic disease
  • 21% more hypertension
  • 64% more diabetes*

*after accounting for race, age, gender, income, education and body weight

HgA1C values, p <0.01

Seligman, HK et al J Nutr 2010; 140: 304-310, US low-income sample n=4908

slide31
The food insecurity—obesity link Possible explanations
  • Periods without enough food cause overeating when food is available
  • Fluctuations in eating habits result in greater efficiency in use of energy
  • Food insecure eat cheaper energy-dense foods
price of sweetened beverages energy content in mj
Price of sweetened beverages ($/energy content in MJ)
  • Tampico: $0.25
  • Safeway Cola: $0.32
  • Coke Classic: $0.44
  • Welch’s Juice: $0.82
  • Minute Maid OJ: $0.94
  • Tropicana OJ: $1.08
  • V8 Fusion: $1.49

Drewnowski and Bellisle, Am J Clin Nutr 2007:85: 651-661

why is it harder to find a link between food insecurity and childhood obesity
Why is it harder to find a link between food insecurity and childhood obesity?
  • Children are relatively protected
  • May be a problem with the way we measure food insecurity
  • May take a long time for obesity due to food insecurity to emerge
how does past food insecurity influence nutrition
How does past food insecurity influence nutrition?
  • About 40% experienced some degree of hunger during childhood
  • At least half expressed the desire to give their children more food, better quality food, foods they lacked in Mexico
  • People may eat less or reject foods they had to eat all the time
  • Some eat compulsively or go out to eat all the time

Kuyper, Espinosa-Hall et al, JNEB Dec 2006

comment from focus groups
Comment from focus groups

“When people didn’t have enough to eat in their childhood, practically on looking at food, one automatically goes back to the time he didn’t. He feels the anxiety, the hunger, and says, ‘I didn’t have enough to eat, I am going to serve this child a huge plate”

Kuyper, Espinosa-Hall et al, JNEB Dec 2006

summary
Summary
  • Food insecurity is associated with obesity in US adults—but hard to say if there is a “causal relationship”
  • May be more important to research ways to improve food security and local access to a healthy diet
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